27108197863 has 2 divisors, whose sum is σ = 27108197864. Its totient is φ = 27108197862.

The previous prime is 27108197827. The next prime is 27108197873. The reversal of 27108197863 is 36879180172.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27108197863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27108197863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27108197873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13554098931 + 13554098932.

It is an arithmetic number, because the mean of its divisors is an integer number (13554098932).

Almost surely, 2^27108197863 is an apocalyptic number.

27108197863 is a deficient number, since it is larger than the sum of its proper divisors (1).

27108197863 is an equidigital number, since it uses as much as digits as its factorization.

27108197863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 27108197863 in words is "twenty-seven billion, one hundred eight million, one hundred ninety-seven thousand, eight hundred sixty-three".